I thought it was fun last fall when I played, but am out of town on business and can't try it again on Mac yet. From my review:

Quote

There are definitely some easy criticisms Ive pointed out, but then you come back to the price: this is a $10 downloadable game. Moreover, it is a $10 game with loads of built-in replayability, co-op and competitive multiplayer modes supporting up to 16 players, and even user-customization of areas, making it a game you can revisit over and over again. Not only that, the developers have updated it constantly since release. Madballs in Babo: Invasion is a great gaming value that is easy to recommend for just about anyone. And since Steam has a demo, it is simple for anyone to play first before committing $10 for the full version.

MacRumors attracts a broad audience
of both consumers and professionals interested in
the latest technologies and products. We also boast an active community focused on
purchasing decisions and technical aspects of the iPhone, iPod, iPad, and Mac platforms.